Almost 10 years after the pioneering magneto-transport measurements on exfoliated graphene (Geim, Novoselov 2004) and on epitaxial graphene on SiC (Berger, de Heer 2004), this unique two-dimensional material still remains a highly competitive topic, as emphasized by the ambitious on-going European “Graphene Flagship” project. This is related to the outstanding electronic properties of graphene, with quasiparticles behaving as massless Dirac fermions with high transport mobilities and unique behaviors such as chiral Quantum Hall Effect or Klein tunneling. The QNES team is deeply involved in exploring the quantum properties of graphene surfaces and graphene-based nanostructures.
Quantum point contacts in high-mobility graphene
STM studies of graphene on the C terminated SiC surface
STM/STS of the charge puddles near the charge neutrality point
Charge puddles studied by very low temperature STM